// JavaScript Document
/*************************************************
Star Rating System
First Version: 21 November, 2006
Second Version: 17 May, 2007
Author: Ritesh Agrawal (http://php.scripts.psu.edu/rja171/widgets/rating.php)
email: ragrawal [at] gmail (dot) com
Inspiration: Will Stuckey's star rating system (http://sandbox.wilstuckey.com/jquery-ratings/)
Half-Star Addition: Karl Swedberg
Demonstration: http://examples.learningjquery.com/rating/
Usage: $('#rating').rating('url-to-post.php', {maxvalue:5, curvalue:0});

arguments
url : required -- post changes to 
options
  increment : 1, // value to increment by
	maxvalue: number of stars
	curvalue: number of selected stars
	

************************************************/

jQuery.fn.rating = function(url,options) {
	
	if(url == null) return;
	
	var settings = {
    url : url, // post changes to 
    increment : 1, // value to increment by
    maxvalue  : 5,   // max number of stars
    curvalue  : 0    // number of selected stars
  };
  if(options) {
    jQuery.extend(settings, options);
  };
  jQuery.extend(settings, {cancel:false}); 
   
  var container = jQuery(this);
	
	jQuery.extend(container, {
    averageRating: settings.curvalue,
    url: settings.url
  });
  settings.increment = (settings.increment < .75) ? .5 : 1;
  var s = 0;
for(var i= 1; i <= settings.maxvalue ; i++){

	var $div = $('<div class="star"></div>')
		.append('<a href="#'+i+'" title="Stars: '+i+'"></a>')
		.appendTo(container);
	if (settings.increment == .5) {
		if (s%2) {
			$div.addClass('star-left');
			} else {
			$div.addClass('star-right');
			}
		}
	i=i-1+settings.increment;
	s++;
	}
 
//message container
$('.star:last').after('<span id=_rate_message></span>');
	
var stars = jQuery(container).children('.star');
var frez = false ; // freeze stars
	
  stars
    .mouseover(function(){
      event.drain();
      event.fill(this);
    })
    .mouseout(function(){
      event.drain();
      event.reset();
    })
    .focus(function(){
      event.drain();
      event.fill(this);
    })
    .blur(function(){
      event.drain();
      event.reset();
    });

  stars.click(function(){ 
	if(frez == true) return false;
	var val = jQuery(this).children('a')[0].href.split('#')[1];
	frez = true;
	stars.unbind();
	
	//post
	var varname = settings.varname;
	$.post(container.url, {vote_rating : val });
	
	//del stars
	$('#rate2').find('div').remove();
	$('#_rating_message').text('Thanks, rating: '+val);
	
  	 return false;
	//message
	$('#_rate_message').text('Rating: '+val);
	settings.curvalue = val;
  });

	var event = {
		fill: function(el){ // fill to the current mouse position.
			var index = stars.index(el) + 1;
			stars
				.children('a').css('width', '100%').end()
				.slice(0,index).addClass('hover').end();
		},
		drain: function() { // drain all the stars.
			stars
				.filter('.on').removeClass('on').end()
				.filter('.hover').removeClass('hover').end();
		},
		reset: function(){ // Reset the stars to the default index.
			stars.slice(0,settings.curvalue / settings.increment).addClass('on').end();
		}
	};    
	event.reset();
	
	return(this);	

};